FUNAI Sylvania LC260SS1 Service Manual page 52

Power Supply CBA & Jack CBA Top View
Because a hot chassis ground is present in the power supply
circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly,
when troubleshooting this type of power supply circuit,
a variable isolation transformer is required.
Power Supply CBA
D206
J231 +6.7V
4 4 4
D651
D650
COLD
R655
HOT
D610
R615
R613
C609
R610
R614
R611
D606
3 3 3
D612
D608 BC601
BC602
Q601
Operation
C605
D620
2
D602
LINE-FL-SHORT
JS603
JS604
LINE-FL-SHORT
LINE-FL-SHORT
JS602
1
JS601
LINE-FL-SHORT
1 2
1
D805
CN802
A
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
C7A3 A3
JS202
Q212
OE2
D405 J204
LCD+24V
R249
Q210
R204
D202
Q208
R235
D207
J232
LCD+15.8V
R250
J230
R253
J216
LCD-6.8V-SW
D204
C637
D636
J219 +6.7V
R661
D638
D634
R244
D635
C224
R242
D209
T601 C632
D632
D646
J603
C606
C642
RISK OF FIRE-
REPLACE FUSE AS MARKED
FH602 FH601
F601
4A/125V
TM602
TOOL NO.
1 2 3 4 5 6 7 8 9 10
CN101
6
B C
BA01A0F0102 3
CN201
10
2
Q401
1 11
J213
P-ON+3.3V D421
J155 PROTECT1 D411
D665
D414
J250
LCD-6.8V
R405
D404
C219
J241 +3.5Vfor1.8V
D412
J242 +36V
J227 +Vtune
P-ON-H1
Q204
J226
Q203
J119 Q640
LCD+15.8V
PROTECT2
R210
C647
J223
LCD+15.8V
J208
+Vtune J142
PROTECT1
J234 P-ON+3.3V
J240
J239 P-ON+3.3V
+3.5Vfor1.8V
D210
D417
R682
C650
J229
R657 C652
+6.7V R684
J237 +6.7V
Q637 D666 R691
J248
LCD+15.8V C655
J308 GND
R678
J309 GND
Q632
J313 GND
J154
PROTECT1
J333
GND
IC631
J332
R697
GND
J330
A-GND
J329
R696
A-GND
J238 ALL+3.3V
J339 GND
R819
R666
J340
GND
A-MUTE
J131
LCD+15.8V
J218
D659 R632
R665
J249 ERR/WARNING
R664
R663 P-ON+3.3V
J262
D644
R821
D806
J263 P-ON+3.3V
J331 GND
J148
C819
PROTECT1
L803
J244
D807 ALL+3.3V
J161
SP+13V
C816
L804
SP+13V
J224
J342
A-GND
A-GND
J344 J301
GND
J345
TM601
GND
J346
GND
J264 SP+13V
J265 SP+13V
J152 MUTEX
BC802
J151
ERR/WARNING
BC803
D
10-15
CAUTION ! : For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
4A/125V
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
A
D420
D401
R402
BC301
J325
J222 TUNER+5V
GND
J122
SCL
J126
J121 SDA
J125
J123
C653
J124
J225
J318 GND
P-ON+5.0V
J316
A-GND
Q641
C654
R698
TU301
J343 GND
R693
J347 GND
D645 J177
J338 GND J129 AOUT-R
J128 AOUT-L
J322 GND
JK742
JK741
JK733 JK731
JK732
JK721 JK841
JK722 JK872 JK871
JK711
Q873 P-ON+5.0V
Q841
J118
J120
PC-A-IN
J136 A-MUTE SPDIF
J266
J246
P-ON+3.3V
P-ON+3.3V
C771
J355 A-GND
9 1
CL701A
C656
J351 GND
R689
C657
R688
Q642
R687
D801
CN801
2
1
9 CL701B
1
BA01A0F0102 3 B
E F
AMP-R
AMP-L
AOUT-R
AOUT-L
J106
P-ON+5.0V
J304 GND
J303 GND
LED1
J158 SPDIF
J127
S-SW
J109
RCV-IN
J267
P-ON+5.0V
GND
J314
J256
BC841
J236
P-ON+3.3V
J130
SEL-R
J132
SEL-L
J135
P-ON-H1
LED-R
J254
J146
FROM LED-R
Jack CBA
JK751
G
BA01A0F01023